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Study on the Measurement of Industrial Structure “Sophistication,Rationalization and Ecologicalization” Based on the Dynamic Analysis of Grey Relations——A Case Study of Beijing-Tianjin-Hebei

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Journal of Systems Science and Information 2020年第2期11卷 130-147页

作者： Shiyi yuan Xiaopeng SUN Weiguo CHEN Yongwu LI School of Economics and Management Beijing University of TechnologyBeijing 100124China

The Beijing-Tianjin-Hebei region is one of the regions with the most dynamic economies,highest degrees of openness,strongest innovation capacities and largest populations,as well as an important engine driving China’s economic development.Currently,the development of the BeijingTianjin-Hebei region faces many difficulties,including an inefficient distribution of regional functions,imbalance in industrial structure,low sophistication,and serious overburdening of resources and the environment.Promoting the overall coordinated development of the region has become an urgent challenge.In this paper,according to the conventions of industrial structure optimization,the three core indicators of regional industrial structure rationalization,sophistication and ecologicalization are constructed.With the help of the grey dynamic correlation model,the three indicators are coupled with the economic growth rate,and the industrial structure optimization index of the Beijing-Tianjin-Hebei region is comprehensively measured.The study shows that rationalization of the industrial structure in the Beijing-Tianjin-Hebei region is increasing but that this trend is not obvious;sophistication of the industrial structure is relatively high and has also been operating at a high level;however,the overall ecological level of the industrial structure in the Beijing-Tianjin-Hebei region is not high and presents the characteristics of high in the middle and low at both ends.In terms of the relationship between industrial structure and economic growth in the Beijing-Tianjin-Hebei region,ecologicalization of the industrial structure has the greatest influence on economic growth,followed by sophistication of the industrial structure,and rationalization of the industrial structure has the weakest influence.

关键词： ecologicalization grey dynamic analysis degrees industrial structure sophistication rationalization

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Truck and Trailer Routing Problem Solving by a Backtracking Search Algorithm

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Journal of Systems Science and Information 2020年第3期11卷 253-272页

作者： Shiyi yuan Jianwen FU Feng CUI Xin ZHANG School of Economics and Management Beijing University of TechnologyBeijing 100124China Research Department of Beijing Smarter Eye Technology Co. LtdBeijing 100123China Institute of Fundamental and Interdisciplinary Sciences Beijing Union UniversityBeijing 100101China

Truck and trailer routing problem(TTRP)is one of the most frequently encountered problem in city distribution,particularly in populated and intensive downtown.This paper addresses this problem and designs a novel backtracking search algorithm(BSA)based meta-heuristics to solve it.The initial population is created by T-sweep heuristic and then based on the framework of backtracking search algorithm,four types of route improvement strategies are used as building blocks to improve the solutions of BSA in the process of mutation and crossover.The computational experiments and results indicate that the proposed BSA algorithm can provide an effective approach to generate high-quality solutions within the satisfactory computational time.

关键词： Truck algorithm trail

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Progress and prospects of carbon dioxide capture,EOR-utilization and storage industrialization

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Petroleum Exploration and Development 2022年第4期49卷 955-962页

作者： yuan shiyi MA Desheng LI Junshi ZHOU Tiyao JI Zemin HAN Haishui CNPC Advisory Center Beijing 100724China State Key Laboratory of Enhanced Oil Recovery Beijing 100083China Research Institute of Petroleum Exploration&Development PetroChinaBeijing 100083China

Carbon dioxide capture,EOR-utilization and storage(CCUS-EOR)are the most practical and feasible large-scale carbon reduction technologies,and also the key technologies to greatly improve the recovery of low-permeability oil fields.This paper sorts out the main course of CCUS-EOR technological development abroad and its industrialization progress.The progress of CCUS-EOR technological research and field tests in China are summarized,the development status,problems and challenges of the entire industry chain of CO_(2) capture,transportation,oil displacement,and storage are analyzed.The results show a huge potential of the large-scale application of CCUS-EOR in China in terms of carbon emission reduction and oil production increase.At present,CCUS-EOR in China is in a critical stage of development,from field pilot tests to industrialization.Aiming at the feature of continental sedimentary oil and gas reservoirs in China,and giving full play to the advantages of the abundant reserves for CO_(2) flooding,huge underground storage space,surface infrastructure,and wide distribution of wellbore injection channels,by cooperating with carbon emission enterprises,critical technological research and demonstration project construction should be accelerated,including the capture of low-concentration CO_(2) at low-cost and on large-scale,supercritical CO_(2) long-distance transportation,greatly enhancing oil recovery and storage rate,and CO_(2) large-scale and safe storage.CCUS-EOR theoretical and technical standard system should be constructed for the whole industrial chain to support and promote the industrial scale application,leading the rapid and profitable development of CCUS-EOR emerging industrial chain with innovation.

关键词： carbon dioxide CCUS-EOR carbon capture transportation oil displacement carbon storage enhanced oil recovery industrialization

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The Fabrication and Detection Performance of High Sensitivity Au-Ag Alloy Nanostar/Paper Flexible Surface Enhanced Raman Spectroscopy Sensors

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Journal of Wuhan University of Technology(Materials Science) 2024年第2期39卷 436-443页

作者：邓芷盈 WANG Tianyi CAO shiyi ZHAO yuan HAN Xiaoyu 张继红谢俊 State Key Laboratory of Silicate Materials for Architectures Department of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China Hainan Institute of Wuhan University of Technology Sanya 572000China International School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China Hepu Research Center for Silicate Materials Industry Technology Beihai 536100China

Au-Ag alloy nanostars based flexible paper surface enhanced Raman spectroscopy sensors were fabricated through simple nanostar coating on regular office paper,and the surface enhanced Raman spectroscopy detection performances were investigated using crystal violet dye analyte.Au-Ag nanostars with sharp tips were synthesized via metal ions reduction method.Transmission electron microscope images,X-Ray diffraction pattern and energy dispersive spectroscopy elemental mapping confirmed the nanostar geometry and Au/Ag components of the nanostructure.UV-Vis-NIR absorption spectrum shows wide local surface plasmon resonance induced optical extinction.In addition,finite-difference time-domain simulation shows much stronger electromagnetic field from nanostars than from sphere nanoparticle.The effect of coating layer on Raman signal intensities was discussed,and optimized 5-layer coating with best Raman signal was obtained.The Au-Ag nanostatrs homogeneously distribute on paper fiber surface.The detection limit is 10-10 M,and the relationship between analyte concentrations and Raman signal intensities shows well linear,for potential quantitative analysis.The calculated enhancement factor is 4.795×10^(6).The flexible paper surface enhanced Raman spectroscopy sensors could be applied for trace chemical and biology molecule detection.

关键词： surface-enhanced raman gold-silver alloy nanostars paper-based SERS sensor flexibility

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粮食价格波动与粮食安全状态传导性研究

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价格理论与实践 2024年第2期 103-108页

作者：袁世一中国农业科学院农业信息研究所

研究粮食价格的传导机制,对于保障粮食安全状态稳定至关重要。本文运用STL-NAR组合模型在价格分量基础上对四种粮食(稻谷、玉米、大豆、小麦)价格进行预测,采用符号动力学将粮食价格涨跌描述为不同的价格状态。同时,运用隐马尔科夫链模... 详细信息

研究粮食价格的传导机制,对于保障粮食安全状态稳定至关重要。本文运用STL-NAR组合模型在价格分量基础上对四种粮食(稻谷、玉米、大豆、小麦)价格进行预测,采用符号动力学将粮食价格涨跌描述为不同的价格状态。同时,运用隐马尔科夫链模型构建了粮食价格与粮食安全的状态转移矩阵。研究结果表明,STL-NAR模型对稻谷、玉米、大豆和小麦价格具有良好的预测性。预测结果显示:2024年稻谷价格呈小幅上涨趋势,小麦价格呈倒“V”型趋势,玉米和大豆价格呈下降趋势。粮食安全稳定程度与价格传导之间存在一定的关系,但两者并不完全一致。当粮食安全稳定时,价格传导相对顺畅,粮食价格往往呈下降趋势;而当粮食安全的稳定性与粮食价格传导受阻时,则需要通过采取有效的政策调控措施,保障粮食安全和粮食价格稳定。

关键词：粮食安全粮食价格预测 STL-NAR 隐马尔科夫链

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Study on Preparation of Lignin-Containing Nanocellulose from Bamboo Parenchyma

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Journal of Renewable Materials 2022年第2期10卷 385-399页

作者： Wenli Gu shiyi Zeng Assima Dauletbek Bin Xu Xinzhou Wang Man yuan Yanni Gu College of Materials Science and Engineering Nanjing Forestry UniversityNanjing210037China College of Civil Engineering Nanjing Forestry UniversityNanjing210037China Bamboo Engineering and Technology Research Center State Forestry and Grassland AdministrationNanjing210037China

Bamboo vascular bundle fiber and parenchyma(BP)are separated by high-temperature treatment with saturated steam.Bamboo vascular bundle fiber is widely used in the market,but how to develop and utilize parenchyma tissue is a difficult problem.The sulfated cellulose nanofibers(ANFs)were obtained by sulfating BP with a deep eutectic solvent(DES),which provided a theoretical basis for the value-added utilization of BP.Using DES as the reaction medium and reagent,the BP was grafted with a sulfonic acid group to form a gel substance in water,ANFs and nanocellulose gel were obtained by ultrasonic cell crusher.The highest yield of ANFS was 75%.The width of the ANFs was about 3 nm,and a small number of nanofiber aggregates existed at the same time.A high aspect ratio of ANFs,due to their high viscosity,has potential applications as enhancers at low concen-trations.Lewis acid(ZnCl 2)added based on binary(DES)greatly improved the thermal stability of the ANFs and maintained the crystal form of cellulose I.

关键词： Lignin nanocellulose deep eutectic solvent bamboo saturated steam heat treatment parenchyma

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Key theoretical and technical issues and countermeasures for effective development of Gulong shale oil, Daqing Oilfield, NE China

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Petroleum Exploration and Development 2023年第3期50卷 638-650页

作者： yuan shiyi LEI Zhengdong LI Junshi YAO Zhongwen LI Binhui WANG Rui LIU Yishan WANG Qingzhen CNPC Advisory Center Beijing 100724China PetroChina Research Institute of Petroleum Exploration&Development Beijing 100083China PetroChina Daging Oilfield Co. Ltd.Daging 163002China

Aiming at the four issues of underground storage state,exploitation mechanism,crude oil flow and efficient recovery,the key theoretical and technical issues and countermeasures for effective development of Gulong shale oil are put forward.Through key exploration and research on fluid occurrence,fluid phase change,exploitation mechanism,oil start-up mechanism,flow regime/pattern,exploitation mode and enhanced oil recovery(EOR)of shale reservoirs with different storage spaces,multi-scale occurrence states of shale oil and phase behavior of fluid in nano confined space were provided,the multi-phase,multi-scale flow mode and production mechanism with hydraulic fracture-shale bedding fracture-matrix infiltration as the core was clarified,and a multi-scale flow mathematical model and recoverable reserves evaluation method were preliminarily established.The feasibility of development mode with early energy replenishment and recovery factor of 3o%was discussed.Based on these,the researches of key theories and technologies for effective development of Gulong shale oil are proposed to focus on:(1)in-situ sampling and non-destructive testing of core and fluid;(2)high-temperature,high-pressure,nano-scale laboratory simulation experiment;(3)fusion of multi-scale multi-flow regime numerical simulation technology and large-scale application software;(4)waterless(CO_(2))fracturing technique and the fracturing technique for increasing the vertical fracture height;(5)early energy replenishment to enhance oil recovery;(6)lifecycle technical and economic evaluation.Moreover,a series of exploitation tests should be performed on site as soon as possible to verify the theoretical understanding,optimize the exploitation mode,form supporting technologies,and provide a generalizable development model,thereby supporting and guiding the effective development and production of Gulong shale oil.

关键词： Gulong shale oil continental shale oil nano confined space production mechanism flow mode early energy replenishment enhanced oil recovery

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Relationships between blood chromium exposure and liver injury:Exploring the mediating role of systemic inflammation in a chromate-exposed population

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Journal of Environmental Sciences 2024年第9期143卷 224-234页

作者： Zekang Su Yali Zhang shiyi Hong Qiaojian Zhang Jiayu Xu Guiping Hu Xiaojun Zhu Fang yuan Shanfa Yu Tianchen Wang Guang Jia Department of Occupational and Environmental Health Sciences School of Public HealthPeking UniversityBeijing 100191China School of Engineering Medicine and Beijing Advanced Innovation Center for Big Data-Based Precision Medicine Beihang UniversityBeijing 100191China National Center for Occupational Safety and Health Beijing 102308China Department of Occupational Health and Radiological Health Chongqing Centers for Disease Control and PreventionChongqing 400042China Henan Institute for Occupational Medicine Zhengzhou 450052China Department of Clinical Laboratory Third Hospital of Peking UniversityBeijing 100191China

Hexavalent chromium and its compounds are prevalent pollutants,especially in the work environment,pose a significant risk for multisystem toxicity and cancers.While it is known that chromium accumulation in the liver can cause damage,the dose-response relationship between blood chromium(Cr)and liver injury,as well as the possible potential toxic mechanisms involved,remains poorly understood.To address this,we conducted a follow-up study of 590 visits from 305 participants to investigate the associations of blood Cr with biomarkers for liver injury,including serum alanine aminotransferase(ALT),aspartate aminotransferase(AST),total bilirubin(TBIL),and direct bilirubin(DBIL),and to evaluate the mediating effects of systemic inflammation.Platelet(PLT)and the platelet-to-lymphocyte ratio(PLR)were utilized as biomarkers of systemic inflammation.In the linear mixed-effects analyses,each 1-unit increase in blood Cr level was associated with estimated effect percentage increases of 0.82%(0.11%,1.53%)in TBIL,1.67%(0.06%,3.28%)in DBIL,0.73%(0.04%,1.43%)in ALT and 2.08%(0.29%,3.87%)in AST,respectively.Furthermore,PLT mediated 10.04%,11.35%,and 10.77%increases in TBIL,DBIL,and ALT levels induced by chromate,respectively.In addition,PLR mediated 8.26%and 15.58%of the association between blood Cr and TBIL or ALT.These findings shed light on the mechanisms underlying blood Cr-induced liver injury,which is partly due to worsening systemic inflammation.

关键词： Blood chromate Liver injury Systemic inflammation Mediation analysis

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Haptic display for virtual reality: progress and challenges

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Virtual Reality & Intelligent Hardware 2019年第2期1卷 136-162页

作者： Dangxiao WANG yuan GUO shiyi LIU Yuru ZHANG Weiliang XU Jing XIAO State Key Laboratory of Virtual Reality Technology and Systems Beihang UniversityBeijing 100083China Beijing Advanced Innovation Center for Biomedical Engineering Beihang UniversityBeijing 100083China Peng Cheng Laboratory Shenzhen 518055China Department of Mechanical Engineering University of AucklandAuckland 1142New Zealand School of Computer Science and the Robotics Engineering Program Worcester Polytechnic InstituteWorcesterMA 01609-2280USA

Immersion, interaction, and imagination are three features of virtual reality (VR). Existing VR systems possess fairly realistic visual and auditory feedbacks, and however, are poor with haptic feedback, by means of which human can perceive the physical world via abundant haptic properties. Haptic display is an interface aiming to enable bilateral signal communications between human and computer, and thus to greatly enhance the immersion and interaction of VR systems. This paper surveys the paradigm shift of haptic display occurred in the past 30 years, which is classified into three stages, including desktop haptics, surface haptics, and wearable haptics. The driving forces, key technologies and typical applications in each stage are critically reviewed. Toward the future high-fidelity VR interaction, research challenges are highlighted concerning handheld haptic device, multimodal haptic device, and high fidelity haptic rendering. In the end, the importance of understanding human haptic perception for designing effective haptic devices is addressed.

关键词： Haptic display Virtual reality Desktop haptics Surface haptics Wearable haptics Multimodal haptics

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基于SBM-GML指数的农业绿色全要素生产率及影响因素分析

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现代农业 2024年第1期49卷 46-53页

作者：袁世一中国农业科学院农业信息研究所北京100008

研究使用全局SBM-GML指数对中国31个省份2011—2019年的农业绿色效率值和绿色全要素生产率进行测算和分解,并运用Tobit模型对影响因素进行了分析。研究结果表明,我国农业的绿色全要素生产效率增长较为缓慢,其中技术效率是推动增长的关... 详细信息

研究使用全局SBM-GML指数对中国31个省份2011—2019年的农业绿色效率值和绿色全要素生产率进行测算和分解,并运用Tobit模型对影响因素进行了分析。研究结果表明,我国农业的绿色全要素生产效率增长较为缓慢,其中技术效率是推动增长的关键因素,技术进步一定程度上起到了制约作用。从全国31个省份整体来看,2019年有14个省份实现农业绿色有效,河南、江西和广东的农业绿色全要素生产率增长率位列全国前三。经济发展水平、产业结构和财政支出对农业绿色全要素生产率提高具有正面影响,人力资本结构、环境规制则具有负面影响;自然灾害对全国、中部和西部的农业绿色全要素生产率提高产生负效应,对东部则产生正效应。

关键词： SBM-GML指数农业绿色全要素生产率技术效率影响因素

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